Light-emitting device and image display apparatus
US10468563B2 · kind B2 · utility
2Cited by
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11Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 2, 2018 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Jul 2, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/0361
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light-emitting device includes a light-emitting element that emits blue light, a Mn2+-activated γ-AlON phosphor and a Eu2+-activated β-SiAlON phosphor that are excited by the blue light to emit green light, and a red phosphor that is excited by the blue light to emit red light. The weight ratio of the Mn2+-activated γ-AlON phosphor to the Eu2+-activated β-SiAlON phosphor is from 20 to 75.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.